{Setasprt.PAS}
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 {Sample code for the SetAspectRatio procedure.}

  uses Crt, Graph;

  const R = 50;
 var
   Driver, Mode: Integer;
   Xasp, Yasp: Word;
 begin
   DirectVideo := False;
   Driver := Detect;   { Put in graphics mode }
   InitGraph(Driver, Mode, '');
   if GraphResult < 0 then
     Halt(1);
   GetAspectRatio(Xasp, Yasp);   { Get default aspect ratio }
   if Xasp = Yasp then
   { Adjust for VGA and 8514. They have 1:1 aspect }
     Yasp := 5 * Xasp;
   while (Xasp < Yasp) and not KeyPressed do
   { Keep modifying aspect ratio until 1:1 or key is pressed }
   begin
     SetAspectRatio(Xasp, Yasp);
     Circle(GetMaxX div 2, GetMaxY div 2, R);
     Inc(Xasp, 20);
   end;
   SetTextJustify(CenterText, CenterText);
   OutTextXY(GetMaxX div 2, GetMaxY div 2, 'Done!');
   Readln;
   CloseGraph;
 end.